Priacanthidae vs order Percomorphi

Priacanthidae and order Percomorphi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Priacanthidae	Yes	No	No	No
order Percomorphi	Yes	No	No	No

Priacanthidae (noun)	order Percomorphi (noun)
small carnivorous percoid fishes found worldwide in tropical seas	one of the largest natural groups of fishes of both marine and fresh water: true perches, basses, tuna